Yes, both Issuebear and HubDesk offer a Free Trial.
Issuebear is designed for Large Enterprises, Small Business, Medium Business and Individuals.
HubDesk is designed for Medium Business and Small Business.
Pricing for Issuebear Starts at $29.00per user / month when Billed Yearly whereas for HubDesk Starts at $16.67/Month when Billed Yearly.
Some top alternatives to Issuebear includes Zendesk Support, Zoho Desk and Tidio Helpdesk.
Some top alternatives to HubDesk includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Jira, FogBugz, Sprintly, Issuetrak, TaskSift, Height, Qualified, Suptask, Sweetjab, Workvivo, Stepsize and IFTTT.